Crownsville is a census-designated place (CDP) in Anne Arundel County, Maryland, United States. The population was 1,670 at the 2000 census. It hosts the Anne Arundel County Fair each September, as well as the annual Maryland Renaissance Festival for several summer weekends. A state psychiatric hospital was formerly in Crownsville. The area offers waterfront scenery and easy access to urban metropolitan areas and culture.

The Maryland Renaissance Festival is a recreation of a fictional 16th century English village named Revel Grove. Located in Crownsville (near Annapolis), the festival is spread over 25 acres and is the second largest renaissance festival in the United States. The Renaissance Festival usually runs from the third week of August to the third week of October every year and as such is a celebration of the autumn harvest^[1]

In September 1989, Jeff Arch began working on a script for TriStar Pictures based on An Affair To Remember. Attracted by the local area, Arch originally placed the main protagonist as a resident in Crownsville in the initial draft. Tristar insisted that Arch choose a different location that would be more well-known to the American movie-going population. After several attempts to please TriStar, Arch finalised on Seattle. The reason often cited by Arch for the change of location was they could not think of a better title than Sleepless in Seattle.

Crownsville is located at 39°1′27″N,76°35′54″W (39.024149, -76.598295)^GR1.

According to the United States Census Bureau the CDP has a total area of 5.6 square miles (14.4 km²), all of it land.